Written and directed by James Ward Byrkit Coherence is more of an "improv theatre experience" than it is an intricately plotted science fiction tale as the actors received no script, they’d get notes each night based on each of their characters, and it would be up to Byrkit to guide the ensemble based on the treatment he had developed. Shot in continuity over five nights at Byrkit’s home the story of Coherence deals with eight people coming together for a dinner party the night of a mysterious comet passing and the effects of said passing. The group of actors Byrkit assembled for his film are mostly known for roles on various television shows, Nicholas Brendon being the most recognizable, but it’s the lack of big name stars which gives the movie that air of reality and the added science fiction elements become easier to digest as well as a making them a little more grounded.
Trivia Note: In this film Nicholas Brendon plays an actor who starred on the television show Roswell when of course he starred as Xander Harris on Buffy the Vampire Slayer.
The crux of the story is that a dinner party is interrupted by a power failure during the comet's passing, the inability to use their cellphones or the internet adding trouble to the situation, but then a house two blocks away is seen to be the only place with lights still on, so two of the guests decide to investigate. It’s at this point one can see how Byrkit was inspired by Rod Serling’s The Twilight Zone as the arguing and fighting that follows is very reminiscent of the episode “The Monsters are Due on Maple Street” and as the story of Coherence unfolds we get a glimpse of who the real monsters are.